CATHydraulic Parts

2803979 — Caterpillar Valve Seat Insert (Inlet) 2803979

This is an inlet valve seat insert, a precisely machined component within the engine's cylinder head that forms the sealing surface for the inlet valve. It is manufactured to meet stringent OEM material and dimensional specifications, ensuring a tight seal and optimal engine performance compared to a worn seat. Operators may observe a decrease in engine power, rough idling, or increased oil consumption when this component begins to fail.

Caterpillar Valve Seat Insert (Inlet) 2803979 – Part No 2803979 – CAT Spare Part
Part Specifications
BrandCAT
CategoryHydraulic Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeInlet Valve Seat Insert
MaterialHardened Steel Alloy
ApplicationEngine Cylinder Head
Service LifeReplace as needed during engine overhaul
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of failure include a subtle reduction in engine performance or a slight increase in exhaust gas recirculation. If left unaddressed, the valve sealing will deteriorate, leading to noticeable power loss and potentially increased oil consumption. Continued operation can lead to valve seat recession and potential cylinder head damage.

Installation Tip

Ensure the cylinder head counterbore is perfectly clean and free from carbon deposits or any foreign material before installation. Use appropriate tools to press the insert in straight, avoiding any cocking or damage to the seat or head.

Service Note

Inspect and replace the corresponding exhaust valve seat inserts, valve guides, and valve stem seals during the same service.